How to return 400 http status code with @NotNull?

问题

I have a method that's receive two parameters: id from type Long and name from type String. I need to validate if name is not null with @NotNull from javax.validation.constraints.NotNull and if it is null I need to return the status code http 400.

This is my implementation.

@GET
@Path(URI.route)
@Produces(MediaType.APPLICATION_JSON)
Response data(@PathParam("id") Long name,
@PathParam("name") @NotNull String name) throws Exception;

Currently it's return https status code 500.
Any idea how I do this?

来源：https://stackoverflow.com/questions/52281666/how-to-return-400-http-status-code-with-notnull